Originally Posted by Raul GS
This is quite interesting. How did you evaluate the sound? What steps did you take to isolate the sound of the 972? How did you compare them to these other more modern sounding AVRs you prefer?
Yes, inquiring minds want to know
. For those of us that have come late to the party, what kind of AVRs or separates were you using to compare systems, Steven? Your comments remind me of how I felt when I moved from a Denon 5803, which had a "flat", less detailed sound without room correction, compared to my first system with room correction, an SC-27 with MCACC and an AS-EQ1. This was before I got into the Audyssey world and AVS "enthusiasm", though.
AFAIK nobody on AVS has done a direct comparison of Trinnov (in the R-972 or a more fully-featured unit like the TEQ or ST2) to Audyssey XT32, or Audyssey XT+Sub EQ. And certainly not at the Home Theater Shack standards that we've been using on the REW thread for graph resolution (subs at no smoothing in the 15-200 Hz range, full range sweeps at 1/6th smoothing from 15 Hz to 20K, etc.). Further, as StevenLansing and others have pointed out, an A/B/X test, even on the same system, would be difficult to use to generalize any firm conclusions without rigorous placement and environmental controls .
Having said that, what I seem to be taking away from here and some of the comparisons that user amt did in December, 2012 on the R972 Trinnov user thread is that the Trinnov in the R-972 EQs below the Schroeder frequency, but with not as much precision as Audyssey XT32 (as per Steve's comments on that thread, and my own eyeball look at the FR plot). For people used to non-flat bass, and that like a "house curve" in the "audiophile" sense, that may be a good thing. Improvement in the time domain would appear to be minimal with at least this version of Trinnov, looking at the waterfall amt did. I'm focusing at no EQ vs. EQ flat, coming from an Audyssey POV.
OTOH, the real impact of Trinnov is in the remapping, where impulse response effects are dramatic:
As Steve points out, and I've seen on a few other users' REW plots with Audyssey, there's little to no actual reduction of reflections with Audyssey. If there are any, they're incidental to the correction in the frequency domain. But, coming from Audyssey, that's a big deal. Especially when you read the adventures of folks doing string tests to find reflection points, and trial+error with acoustic panels to get around a less-than-optimal Audyssey treatment of that area (to the extent that any non-Trinnov commercial RC can look at impulse response).
At least for the R-972 version of Trinnov, does this sound like a reasonable "starting point" for thinking about differences between systems? Has anyone else found similar effects, or am I generalizing from a sample of one?Edited by sdrucker - 5/24/13 at 8:33pm